Method for preparing terbium-doped cerium fluoride porous nanospheres based on herring sperm DNA template
A technology of terbium cerium fluoride and herring essence, which is applied in the field of preparing terbium-doped cerium fluoride porous nanospheres based on herring essence DNA template
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[0020] Example: Weigh 0.0623g herring sperm DNA, put it in 20mL deionized water, stir at low speed for half an hour, and prepare a DNA solution with a concentration of 3.12mg / mL. According to Ce 3+ / Tb 3+ The molar ratio is 95:5, weigh 0.2702g terbium oxide (Tb 4 o 7) in a beaker, add nitric acid solution with a volume ratio of nitric acid and deionized water of 1:1 to make it completely dissolved, and slowly evaporate to remove excess nitric acid. After cooling to room temperature, add 40mL of deionized water to obtain Tb(NO 3 ) 3 precursor solution. Weigh 1.654g of Ce(NO 3 ) 3 ·6H 2 O, added to Tb(NO 3 ) 3 solution, stir to dissolve completely. Add the prepared DNA solution dropwise to the prepared Ce(NO 3 ) 3 with Tb(NO 3 ) 3 In the mixed solution, stir at room temperature for 24 hours, so that the positively charged cerium ions and terbium ions are fully adsorbed on the negatively charged phosphate radicals on the DNA and the N atoms on the bases. Weigh 0.45...
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